Propylene Carbonate and Dimethyl Carbonate Removed from VOC List

The U.S. Environmental Protection Agency has removed Propylene Carbonate (CAS# 108-32-7) and Dimethyl Carbonate (CAS# 616-38-6) from the definition of Volatile Organic Compounds (VOCs) at 40 CFR 51.100(s) in a ruling published January 21, 2009. EPA has determined these two compounds are negligibly reactive, meaning they contribute little or nothing to tropospheric ozone formation.

Facilities should report Propylene Carbonate and Dimethyl Carbonate as VOCs for the calendar year 2008 emissions inventory because they were considered VOCs for that year. Facilities will not be required to report Propylene Carbonate and Dimethyl Carbonate as VOCs in the emissions inventory for calendar year 2009.